Selecting and Recruiting Subjects As the number of subjects assigned to treatment conditions increases,
A)the ability to detect small effects increases.
B)the need for a control group decreases.
C)the need to match subjects increases.
D)the risk of confounding increases.

Question

Quizplus · Accepted Answer

As the number of subjects assigned to treatment conditions increases, the ability to detect small effects increases. This is because there are more participants providing data and thus, the statistical power increases. With a greater statistical power, researchers are more likely to detect smaller effects, which may have gone unnoticed if there were fewer participants.

Selecting and Recruiting Subjects as the Number of Subjects Assigned